Roll



E. REED.

ROLL. FILED- M APPHCAT O 31,1921- I 1,405,161 Patent ed Jan. 31, 1922.

1 15.1 FIG-.E.

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ATTORNEYS UNITED STATES EDWIN REED, OF ANDOVER, MASSACHUSETTS.

ROLL.

Specification of Letters Patent.

Patented Jan. 3 1, 1922.

Application filed March 31, 1921. Serial No. 457,291.

To all whom it may concern:

Be it known that I, EDWIN REED, a c1t1- zen of the United States, residing at Andover, in the county of Essex and State of Massachusetts, have invented new and useful Improvements in Rolls, of which the following is a specification. I

This invention relates generally to a roll of relatively small diameter and comprising a rigid discoida-l body or center and an annular facing presenting a resiliently yielding tread surface or periphery.- Examples of a roll to which the invention relates may be found in spinning-rolls employed in, spinning textile materials, such as worsted, silk, etc., the tread surface of the roll cooperating with the tread surface of a companion roll to act in a well known manner on textile fibers passing between the rolls. Another example may be found in the small wheels supporting hand-operated merchandise or warehouse trucks.

The object of the invention is to provide an annular facing forming a resiliently yielding tread, and adapted to be quickly and se curely attachedto a discoidal body or center of rigid material, without liability of displacement of the tread on the body by creeping, and to enable the roll body or center to be securely engaged with a bonding layer, uniting the improved facing to the body.

The invention is embodied in the improvements hereinafter described and claimed.

Of the accompanying drawings forming a part of this specification,

Figure l is a side view of a roll body facing constructed in accordance with the invention.

Figure 2 is a transverse section on line 2-2 of Figure 1.

Figure 3 is a transverse sectional view of the roll body or center.

Figure-4 is a view similar to Figures 2 and 3, showing the facing attached to the body in accordance with the invention.

Figure 5 is an enlargement of a portion of Figure 4.

Figure 6 is a fragmentary side view of a facing composed of three rings.

Figure 7 is a section on line 7--7 of Figure 6.

Figure 8 is a fragmentary side view of a facing and a bonding layer vulcanized thereto.

The same reference characters indicate the same parts in all of the figures.

In the drawings, 12 represents a di'scoidal body of any suitable relatively rigid material, such as wood, or metal, the body being attached to a shaft 13, projecting from opposite sides of the body, and adapted to cooperate with suitable bearings.

An annular facing for the body 12 is provided by assembling two concentric rings of unvulcanized rubber, viz., an inner ring 16, adapted to be rendered hard by vulcanization, and an outer ring 15, which remains relatively soft and resiliently yielding when vulcanized. The rings are assembled before vulcanization, and are united to each other by the usual vulcanizing process.

- To prepare the body for attachment to the facing, I provide the body with a grooved periphery, preferably by forming a plurality of peripheral grooves 18, each surrounding the body. To the grooved periphery I apply an annular bonding layer which, in the embodiment ofthe invention shown by Figures 4 and 5, is composed of a hard drying cementitious material, such as shellac, said material filling the grooves 18,

and covering the peniphery of the body.

The facing, preferably coated internally with the same material, is then applied to the body, and the assemblage is allowed to stand until the shellac dries and solidifies. The shellac forms a thin bonding layer 20, interposed. between the body 12 and the hard rubber inner ring 16. Said layer, which is shown considerably exaggerated by Figure 5, adheres closely to the inner ring, and has internal ribs or projections 21 interlocked with the walls of the grooves 18, so that the facing is firmly secured to the body.

The body may be provided with a single annular groove, extending entirely around its circumference, or with a plurality of annular grooves as shown, or with: grooves which are not annular or continuous, and are arranged in any desired manner.

It is essential that the body have a peripheral surface of suitable area to" adequately support the facing, and oppositely facing shoulders formed by the sides of a roove or grooves in the periphery of the b0 y to laterally support ribs or projections integral with-a bonding layen interposed between the body and the facing. The body 12, formed as shown, may be made of wood, and is suitable for a roll of relatively large diameter, say five inches, more or less, said body and the facing constituting a roll suitable for use in worsted spinning.

ing thereon, a facing which includes an 111- ner ring of hard rubber, and a soft ,rubber tread, is adapted to be held in place by the bonding layer without liability of creeping.

The grooved periphery of the body 12 enables the facing to be quickly and conveniently secured to the body without the necessity-of skilled labor and special appliances, so that a new facing may be readily substituted for a worn out facing, without sending the body to an establishment having special appliances for renewing the facing.

As shown by Figures 6 and 7, the outer ring may be composed of two concentric layers 15 and 15 the latter being softer than theformer, and constituting a cushion.

I do not limit myself to abonding layer composed of hard drying, cementitious material, although I consider this preferable. As shown by Figure 8, a bonding layer 20 may be employed, the same being a thin annular layer of soft rubber vulcanized to the inner surface of the hard rubber inner ring'16, and of only sufiicient thickness to be interlocked with a helical groove formed by the convolutions of a screw thread cut in the periphery of the roll body, as shown and specifically claimed in my copending application, Serial No. 457,292, filed March 31, 1921. A roll embodying the construction last described is particularly adapted for 60 use in silk spinning, the roll being of smaller diameter than a roll used in worsted spinning. I

I elect to claim broadly in this application a roll comprising a rigid body or center having a grooved periphery, an annular facing composed of an outer ring of soft rubber (and including, if desired, a plurality of such layers), and an inner ring of hard rubber, and a bonding layer interposed between the inner ring and the grooved periphery of the body and interlocked with said grooved periphery, said bonding layer being confined against displacement relatively to the body by the grooved periphery, and adherent to the inner ring to prevent displacement of the annular facing relatively to the bonding layer.

I claim:

1. A roll comprising a rigid body or center, having a grooved periphery; an annular facing which includes an outer ring of relatively soft rubber constituting a resiliently yielding tread and an inner ring of hard rubber vulcanized to the outer ring; and an annular bonding layer interposed between the inner ring and the grooved periphery of the body, said layer being interlocked with said grooved periphery and confined thereby against displacement relatively to the body, and adherent to the hard rubber ring to prevent displacement of said annular facing relatively to the bonding layer.

2. A roll comprising a rigid body or center, having a grooved periphery; an annular facing which includes an outer ring of relatively soft rubber constituting a resiliently yielding tread, and an inner ring of hard rubber vulcanized to the outer ring, and an annular bonding layer of hard drying cementitious material, interposed between the inner ring and the grooved periphery of the body, said layer being interlocked with said grooved periphery and confined thereby against displacement relatively to the body, and adherent to the hard rubber ring to prevent displacement of said annular facing, relatively to the bonding layer.

In testimony whereof I have affixed my signature.

EDWIN REED. 

